JSFiddle - React, Tailwind, and code Playground

HTML

1<input type=checkbox  id=1 name=1>
2<input type=checkbox  name=2>
3<input type=checkbox  name=3>
4<input type=checkbox  name=4>
5<input type=checkbox  name=5>
<p>Todas<input type=checkbox  id=all name=all></p>

JavaScript

if (document.getElementById("all").checked = true){
    //selecionar todas
}

if (document.getElementById("all").checked = false){
   //des-selecionar todas
}